Radio and X-Ray Detectability of Buoyant Radio Plasma Bubbles in Clusters of Galaxies

Abstract

The Chandra X-ray Observatory is finding a surprisingly large number of cavities in the X-ray emitting intracluster medium, produced by the release of radio plasma from active galactic nuclei. In this Letter, we present simple analytic formulae for the evolution of the X-ray deficit and for the radio spectrum of a buoyantly rising bubble. The aim of this work is to provide a theoretical framework for the planning and the analysis of X-ray and radio observations of galaxy clusters. We show that the cluster volume tested for the presence of cavities by X-ray observations is a strongly rising function of the sensitivity.

4 pages, 3 figures, accepted by Astronomya & Astrophysics Letters

References in corpus (4)

• Chandra Observation of the Radio Source / X-ray Gas Interaction in the Cooling Flow Cluster Abell 2052
• Discovery of Ghost Cavities in Abell 2597's X-ray Atmosphere
• Discovery of depressions in the X-ray emission of the distant galaxy cluster RBS797 in a CHANDRA observation
• Synchrotron Self-Comptonized Emission of Low Energy Cosmic Ray Electrons in the Universe: I) Individual Sources

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• Low Frequency Radio Observations of X-ray Ghost Bubbles in Abell 2597: A History of Radio Activity in the Core
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• White Paper: Radio Emission and Polarization Properties of Galaxy Clusters with VLASS